Preempt mode

Where multiple backup routers exist in a VR, if the current master fails and the highest-priority backup is not available, VRRP selects the next-highest priority backup to operate as master. If the highest-priority backup later becomes available, it preempts the lower-priority backup and takes over the master function. If you do not want a backup router to have this preemptive ability on a particular VR, you can disable this operation with the no preempt-mode command. (Preempt mode applies only to VRRP routers configured as backups.)